完成句子。
1. 因为交通拥挤，今早我又迟到了。
I was late again this morning ________ ________ the heavy traffic.
2. 经过一天的努力， 他们终于扑灭了森林大火。
After a day's hard work，they ________ ________ the forest fire at last.
3. 该动身了，飞机一小时后起飞。
________ time ________ set off，since the plane will take off in an hour.
4. 休息会吧，我太累了，不能再走了。
Let's have a rest，I'm ________ tired ________ walk any farther.
5. 如果父母读读自己孩子的微博，就能更好地了解他们的想法。
________ parents can read their children's micro blogs, they ________ know their thoughts better .
